2 years ago

2(x-7)+3=2x-10 This question has how many solutions

Mathematics

2 answers:

ycow [4]2 years ago

8 0

I believe the answer is 0=1

Helen [10]2 years ago

6 0

Answer:

there are no values of x that make the equation true

Step-by-step explanation:

there is no solution

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A soccer ball is kicked toward the goal. The height of the ball is modeled by the function h(t) = −16t2 + 48t where t equals the

Vitek1552 [10]

Answer:

Last one

t = 1.5; it takes 1.5 seconds to reach the maximum height of 36 meters.

Step-by-step explanation:

h(t) = −16t² + 48t

h(t) = -16(t² - 3t)

h(t) = -16(t² - 2(t)(1.5) + 1.5² - 1.5²)

h(t) = -16(t - 1.5)² + 36

Axis of symmetry:

t = 1.5

Max height = 36

7 0

2 years ago

Prove that if one solution for a quadratic equation of the form x 2 + bx + c = 0 is rational (where b and c are rational), then

erica [24]

$x^2+bx+c = (x-r)(x-s)\\
x^2+bx+c = x^2-(r+s)x+rs\\\\
b = -(r+s)\\ c = rs$

Say r is rational. Suppose for a second, that s is not. Then, r+s is irrational. But this contradicts the fact that b is rational.

So, if one root is rational, then the other root is also rational

7 0

3 years ago

A student earns scores of 80, 87, and 82 on the first three of four tests. If the student wants to achieve a quiz average of 85,

aleksandrvk [35]

Answer:

Step-by-step explanation:

85= $\frac{80+87+82+x}{4}$ then multiply the 4 over and subtract 80, 87, and 82 to find x which gives you 91